# 看做是开发写好的接口代码/函数====>被测代码


def add(a:int, b:int) -> int:
    print(a + b)
    return a + b


def minus(a, b):
    print(a - b)
    return a - b


def muli(a, b):
    print(a * b)
    return a * b


def div(a, b):
    print(a / b)
    return a / b

